In-depth introduction to CChart daily course-Happy high 4 Lesson 15th Rome tongtu, using the ChartCtrl control to achieve multi-area plotting, cchartchartctrl

In-depth introduction to CChart daily course-Happy high 4 Lesson 15th Rome tongtu, using the ChartCtrl control to achieve multi-area plotting, cchartchartctrl

It is common to draw multiple images in one window. In the previous course, I have introduced three multi-area plotting methods. Multi-area plotting using split view, multi-area plotting using CChart class, and multi-area plotting using CChartWnd class. Among them, the third method is implemented by the dummies recently. In earlier versions, CChartWnd can only draw one graph.

Because the ChartCtrl control is provided in the new version, it is stupid to find that using this control to achieve multi-region plotting is the most perfect.

In fact, from the content of the previous three lessons, the friends must have known how to use ChartCtrl to draw multiple diagrams. Although there is only one graph at a time, however, you can draw Multiple Graphs in the same way.

It's so stupid to give a complete demonstration.

Step 1: Create a dialog box-based MFC program LessonA15.

Step 2: copy the CChart library file to the LessonA15 directory.

Step 3: Use the resource editor to open the Main Dialog Box, delete the "TODO: Set dialog Control here" label, and add two Custom controls with the IDS IDC_CHART1 and IDC_CHART2 respectively, its class is set to ChartCtrl.

The dialog box layout is roughly as follows.

Step 4: Open the LessonA15Dlg. cpp file, add the CChart header file and reference the imported/imported file to the header, and add the math header file.

#include <math.h>#include "Chart.h"#ifdef _DEBUG#if defined(_UNICODE) || defined(UNICODE)#pragma comment(lib, "PlotDll_ud.lib")#else#pragma comment(lib, "PlotDll_d.lib")#endif#else#if defined(_UNICODE) || defined(UNICODE)#pragma comment(lib, "PlotDll_u.lib")#else#pragma comment(lib, "PlotDll.lib")#endif#endif

Step 5: Add a function before the OnInitDialog function to draw a contour line.

double func(double x, double y){return 1.0/((x-1.5)*(x-1.5)+(y-0.8)*(y-0.8)+1.0)+1.0/((x+1.5)*(x+1.5)+(y-0.8)*(y-0.8)+1.0)+1.0/(x*x+(y+0.8)*(y+0.8)+1.0);}

Step 6: add the drawing code in the OnInitDialog function as follows.

// TODO: Add extra initialization hereCWnd * pWnd; CChart * chart; pWnd = GetDlgItem (IDC_CHART1); chart = GetChart (pWnd-> m_hWnd); chart-> SetType (kTypeContour ); chart-> SetFieldFcn (func); chart-> SetPlotRange (-2, 2,-2, 2); chart-> SetContourLineNum (80 ); chart-> SetTitle (_ T ("Abe"); chart-> SetBkgndColor (GetSysColor (COLOR_3DFACE); chart-> SetEdgeShow (true); pWnd = GetDlgItem (IDC_CHART2 ); chart = GetChart (pWnd-> m_hWnd); chart-> AddPoint2D (10.0, 0.0); chart-> AddPoint2D (9.7, 6.0); chart-> AddPoint2D (0.0, 6.0 ); chart-> AddPoint2D (0.025, 5.5); chart-> AddPoint2D (9.225, 5.5); chart-> AddPoint2D (9.5, 0.0); chart-> AddPoint2D (10.0, 0.0 ); chart-> AddPoint2D (6.0, 5.5, 1); chart-> AddPoint2D (6.15, 2.5, 1); chart-> AddPoint2D (9.375, 2.5, 1 ); double pX [100], pY [100]; int I; for (I = 0; I <100; I ++) {pX [I] = 7.7 + 0.5 * cos (I * 2.0*3.1415926536/100.0 ); pY [I] = 4.0 + 0.5 * sin (I * 2.0*3.1415926536/100.0);} chart-> AddCurve (pX, pY, 100 ); chart-> SetDataColor (RGB (20, 20, 20), 0); chart-> SetDataColor (RGB (20, 20, 20), 1 ); chart-> SetDataColor (RGB (20, 20, 20), 2); chart-> SetDataLineSize (3, 0); chart-> SetDataLineSize (3, 1 ); chart-> SetDataLineSize (3, 2); chart-> SetXRange (-2, 12); chart-> SetYRange (-5, 10 ); chart-> SetTitle (_ T ("dog slab"); chart-> SetBkgndColor (GetSysColor (COLOR_3DFACE); chart-> SetEdgeShow (true );

Now you can run the program and result.

The parade is about to take place tomorrow.

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